Changes

==== Summer infection of the snail ====

==== Summer infection of the snail ====

Fluke eggs passed in '''spring'''

The fluke eggs passed in sping will hatch in June. This coincides with the hatching of the snail. The miracidia will then infect the newly hatched snails, mature and then multiply within the snail hepatopancreas during the summer months.

The cercariae are shed from late August onwards. The metacercariae develop and are ingested by a host; the sheep for example.  The immature flukes then migrate through the liver, causing acute disease between the months of September and November, or chronic disease from January onwards.

 

 

 

→ cercariae shed from '''late August''' onwards

 

→ metacercariae ingested by sheep

 

→ immature flukes migrate through liver

 

→ '''acute''' disease '''September-November'''; or '''chronic''' disease '''January''' onwards

==== Winter infection of the snail ====

==== Winter infection of the snail ====